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and by a "high - low level" switch inside the water tank. <br /> <br /> <br /> <br />The electric powerlines necessary for the operation of this mp <br />system have been installed within the permit area and their <br />location is shown on Figure 4.2-3. No additional powerli es will <br />be necessary. <br />The water will be directed underground from the Ovate tank through <br />the mine piping system to the mining operations o will be pumped <br />into the water thickener, which is part of the dace facilities <br />(see 4.3.3.4.2) for use in the surface an underground water <br />system. <br />Since the entire mine Hydraulic operation is a "closed system", and <br />limited mine water inflow is expected, e entire installation will <br />perform on an augmention or maY,e-up w er basis. It is anticipated <br />that the daily pump operating time will be approximately 10 to 12 <br />hours per day, assumming a pumpi g rate of 55 gpm. <br />In general, the steel pip w laid on the existing ground surface <br />and aligned to avoid dist r ance to natural vegetation. Within the <br />facilities area, the i was buried at a few locations to provide <br />road access across th ipeline. Presently, the pipeline crosses <br />beneath County Road 5 through a culvert. It has been determined <br />that reduction ir~ ow by the 2-inch pipe within the culvert is not <br />significant wit respect to the total capacity of the culvert <br />(Exhibit 9.3-4 However, when the county road is paved according <br />to Garfield ounty Land Use Permit stipulations prior to any mine <br />constructi n, NCIG commits to rerouting the pipe, either through a <br />separate culvert or directly buried. <br />NCIG - Coal Ridge #1 <br />4-33 <br />ABC/1145/910509 <br />i R- <br />